Donut power mesh scheme for flip chip package

Abstract

A multiple layer mesh design which includes a layer which provides a vertical mesh and an adjacent layer which provides a horizontal mesh which includes an open area or hole. The layer which provides the horizontal mesh (with hole) may either be above or below the vertical mesh layer, depending on the design. The vertical mesh may be full or may surround an open area or hole where the design includes both a horizontal donut mesh and a vertical donut mesh.

What is claimed is:  
     
       1. A multiple layer mesh design comprising a layer having a vertical mesh; a layer having a horizontal mesh, said horizontal mesh surrounding an open area, said layer having the vertical mesh being disposed adjacent to the layer having the horizontal mesh surrounding the open area, said horizontal mesh comprising continuous horizontal lines but for the open area, said vertical mesh comprising vertical continuous lines, said horizontal mesh comprising horizontal lines which end at said open area and are non-terminal on any of said vertical lines, said vertical mesh comprising a plurality of vertical lines which traverse said open area and are non-terminating with regard to said horizontal lines. 
     
     
       2. A multiple layer mesh design as recited in  claim 1 , wherein the open area is generally in the middle of the layer. 
     
     
       3. A multiple layer mesh design as recited in  claim 1 , wherein the vertical mesh is a full vertical mesh. 
     
     
       4. A multiple layer mesh design as recited in  claim 1 , wherein the vertical mesh also surrounds an open area. 
     
     
       5. A multiple layer mesh design as recited in  claim 1 , wherein the multiple layer mesh design comprises an even number of routing layers and said layer having the vertical mesh is on the top layer. 
     
     
       6. A multiple layer mesh design as recited in  claim 5 , wherein the layer having the horizontal mesh surrounding the open area is on the next layer going down relative to said layer having the vertical mesh. 
     
     
       7. A multiple layer mesh design as recited in  claim 1 , wherein the multiple layer mesh design comprises an odd number of routing layers and said layer having the horizontal mesh surrounding the open area is on the top layer. 
     
     
       8. A multiple layer mesh design as recited in  claim 7 , wherein the layer having the vertical mesh is on the next layer going down relative to said layer having the horizontal mesh surrounding the open area. 
     
     
       9. A multiple layer mesh design as recited in  claim 4 , further comprising a layer which includes a vertical mesh at its center. 
     
     
       10. A multiple layer mesh design as recited in  claim 9 , wherein the layer which includes a vertical mesh at its center is below the layers with the vertical and horizontal mesh which surround an open area. 
     
     
       11. A multiple layer mesh design comprising a layer having a vertical mesh; a layer having a horizontal mesh with an open area generally in the middle, said layer having the vertical mesh being disposed adjacent to the layer having the horizontal mesh with the open area, said horizontal mesh comprising continuous horizontal lines but for the open area, said vertical mesh comprising vertical continuous lines, said horizontal mesh comprising horizontal lines which end at said open area and are non-terminal on any of said vertical lines, said vertical mesh comprising a plurality of vertical lines which traverse said open area and are non-terminating with regard to said horizontal lines. 
     
     
       12. A multiple layer mesh design as recited in  claim 11 , wherein the vertical mesh is a full vertical mesh. 
     
     
       13. A multiple layer mesh design as recited in  claim 11 , wherein the vertical mesh also surrounds an open area. 
     
     
       14. A multiple layer mesh design as recited in  claim 11 , wherein the multiple layer mesh design comprises an even number of routing layers and said layer having the vertical mesh is on the top layer. 
     
     
       15. A multiple layer mesh design as recited in  claim 14 , wherein the layer having the horizontal mesh with the open area is on the next layer going down relative to said layer having the vertical mesh. 
     
     
       16. A multiple layer mesh design as recited in  claim 11 , wherein the multiple layer mesh design comprises an odd number of routing layers and said layer having the horizontal mesh with the open area is on the top layer. 
     
     
       17. A multiple layer mesh design as recited in  claim 16 , wherein the layer having the vertical mesh is on the next layer going down relative to said layer having the horizontal mesh with the open area. 
     
     
       18. A multiple layer mesh design as recited in  claim 13 , further comprising a layer which includes a vertical mesh at its center. 
     
     
       19. A multiple layer mesh design as recited in  claim 18 , wherein the layer which includes a vertical mesh at its center is below the layers with the vertical and horizontal meshes which surround an open area.